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t e e h S w e e h s 2 V M d 0 M O W No. 410,729. Patented Sept. 10, 1889.

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B. OAPITAINE. VALVE GEAR- FOR GAS ENGINES.

No. 410,729. Patented Sept. 10, 1889.

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N. PETERSv Phawhhognphu. wnhmglan. III-C UNITED STATES PATENT OEErcE.

EMIL CAPITAINE, OF BERLIN, GERMANY.

VALVE-G EAR FOR GAS-ENGINES.

- SPECIFICATION forming part of Letters Patent No. 410,729, dated September 10, 1889.

Application filed November 28, 1888- Serial No. 292,072. (No model.) Patented in Germany February 4, 1888, No. 44,409-

.To all whom, it may concern:

Be it known that I, EMIL CAPITAINE, a subject of the German Emperor, and a resident of Berlin,in the Kingdom of Prussia and German Empire, have invented certain new and useful Improvements in Valve-Gears for Gas- Engines, (for which Letters Patent No. 44,409, dated September 10, 1888, protection beginning February 1 1888, were issued in Germany,) of which the following is a specification.

This invention relates to a new and improved valvegear for gasengines of that class in which an explosion takes place for every two revolutions of the main shaft or every four strokes of the piston.

The object of my invention is to provide a new and improved valve-operating gear which is simple in construction, adjusts itself automatically to operate the valve at the proper time, and dispenses with the use of noisy cogwheels.

In the accompanying drawings, Figures 1, 2, and 3 are elevations of myimproved valveoperating gear for gas-engines, showing parts in different positions, some parts being in section and others broken out. Fig. l is a vertical transverse sectional view on line a: m, Fig. 1. Figs. 5, (S, 7, and S are elevations of a modification, showing the parts in different positions, parts being in section. Fig. 0 is an enlarged vertical transverse sectional view of this modified construction. Figs. 10, 11, 12, and 13 are detail elevations showing the different positions of the spring and heart-cam.

Similar letters of reference indicate corresponding parts.

The val ve-spindle M is acted upon by a spiral spring N, which presses it downward. The reciprocating rod 1) is connected with a band 0, surrounding the eccentric-disk P. The guide-pin Q passes into a longitudinal guide-slot R of the rod 1).

A laterally-swinging arm a is pivoted by a pivot a to the upper end of the rod 7). Near the upper end of said hinged part a a pivot d passes through it from front to rear, and on the inner end of said pivot (Z a lever A is mounted to rock, which is provided at its lower end with an enlargement f, forming a friction-spring bearing against the rear edge of the hinged part a.

The lever A is provided with two laterallyprojecting arms o v, the ends of which can strike against the fixed projections o and 0' on the cylinder T.

The upweirdly-projecting arm 2' of the lever A carries the pin 1'', provided with an antifriction roller, and is located between two flat springs s and s, secured to the cylinder and projecting upward.

The valve-stem M is provided on its lower end with a tapering head V.

When the rod 1) moves upward, the upper end of the hinged part a, which is in line with the rod b, abuts against the lower end of the head V and presses the same and the valvestem upward, compressing the spring N. During the upward stroke of the rod 1) the arm 01' strikes against the projection 0, whereby the lower end of the lever A is swung to the left and the upper end, carrying the anti-friction roller, to the right, and the said anti-friction roller, acting on the spring 5', presses the upper end of the same to the right. Attention is here called to the fact that the friction of the spring part f on the rear edge of the hinged part a is so regulated as not to be overcome by the springs s and 8. When the rod 1) moves downward to its lowest position, the end of thehinge-piece a leaves the end of the tapered head V, and the spring 8', the upper end of which has been bent to the right by the anti-friction roller on the lever A, now acting on said roller, swings the lever A and the hinged piece a, on which the lever A is held in place by the friction-spring f, toward the left, so that when the rod 1) rises again the upper end of the hinged part a will not abut against the lower end of the tapered head V, but will slide up on the side of said head, as shown in Fig. 3, and thus will not operate the valve. \Vhen the rod 1) has completed its upward stroke, the arm 1) strikes against the projection 0, whereby the lever A is swung in such a manner that its lower end is moved to the right audits upper end to the left, thereby bringing the left-hand spring 3 in tension. WVhen the rod 1) descends, the spring 5, which has been brought in tension, as described, swings the lever A back into vertical position, so that when the rod 1) again rises the upper end of the hinged piece a will abut against the bottom of the head V and lift the valvestem,.and so on alternately, It thus follows that'for one upstroke of the rod 1) the valve will be operated and will not be operated by thefollowing upstroke, and so on.

In the construction shown in Figs. 5 to 13 the part b is hinged to the upper end of the reciprocating rod 1), which is operated by the eccentric, and said part b is provided at its upper end on one edge with a head 12 having its lower end made V-shaped. A spring 0 is fixed at its lower end on a projection of the cylinder T, and is provided at its upper end with an enlargement 0', through which a pivot B, projecting from the cylinder, can pass. On the upperend of the spring 0 an inverted heart-cam A is pivoted, which is provided at its lower end with a segmental slot D,into which the pin B projects. 7

The operation of this construction is as follows: When the hinged part b is in line with the reciprocating rod 19, as shown in Fig. 5, andsaid rod 12 moves upward, the upper end of the hinged part b will abut against the tapered head V on the lower end of the valverod and press said valve-rod upward. As shown, the V-shaped head 19* is now some distance above the cam A As the rod 1) descends the left-hand side of the V-shaped bottom edge of the head I) strikes the heart-cam A and swings the same into the position shown in Figs. 7 and 11, whereby the spring 0 is bent to the left and the hinged part b is swung to the right, 'so that when the rod 1) again rises the hinged part b will be so inclined that it cannot abut against the lower end of the head V, as shown in Fig. 8, and thus the valve will not be operated during this upstroke of the rod b. The spring 0 has straightened in the meantime and assumes the position shown in Fig. 12, whereby the heart-cam A is drawn from the position shown in Fig. 7 to the position shown in Figs. 8 and 12. As the rod 1) descends the point of the head 17 engages the point of the heart-cam A, the heartcamA and the head b having the position shown in Fig. 13, the upper end of the spring 0 being bent to the right and the hinged part I) being in vertical position. It now the rod B moves upward, its upper end can abut against the lower end of the head V on the valve-stem. The spring 0 straightens and thereby its upper end is moved to the left, and the heart-cam A is again brought into the position Fig. 10, which corresponds to its position shown in. Fig. 5, when the above-described operation can repeat itself, and so on.

Having thus described my invention, I claim as new and desire to secure by Letters Patent? 1. In valve-gear for gas-engines, the combt nation, with a valve-stem and a reciprocating rod, of a hinged piece on the end of the reciprocating rod, which hinged piece is adapted to act on the valve-stem, and a spring-actuated mechanism, substantially as herein described, for inclining the hinged part so that the same will not strike the valve-stem at alternate strokes, substantially as set forth.

2. The combination, with a valve-stem, of a reciprocating rod, a hinged part on the end of said reciprocating rod, a lever pivoted 011 said hinged part, fixed springs acting 011 the lever, and fixed stops acting on said lever, substantially as set forth.

3. In a valve-gear, the combination, with a valve-stem, of a reciprocating rod, a hinged part on the end of said reciprocating rod, a lever pivoted on said hinged part and having a spring bearing on the hinged part, said lever also having two opposite arms, fixed springs that can act 011 said lever, and fixed stops that can act on the arms of said lever, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

EMIL OAPITAINE.

\/V i tn ess'es:

CARL BORNGRAEBER, BERNH. POERSCHMANN. 

